Symbol of the city and an expression of Gothic architecture, it was founded in 1386. Embellished with 3,400 statues, the most famous being the Madonnina on the main spire that is 108.5 m. high. Inside, the cathedral is divided into a nave and four aisles separated by 52 giant columns. The polychrome windows dating from the 15th – 16th century are quite remarkable. Visits can be made to the crypt, the treasures of the cathedral and the adjoining Cathedral Museum. A visit to the walkways on the roof is fascinating (by stairs or lift).